IBM PS/2 (Model 90 XP 486) - Technical Specifications

IBM Personal System/2 Model 90 XP 486

8590 processor complexes (187kb)

General information
Machine type: 8590
Announce date: October, 1990

Excerpt from the original announcement letter;

"The Personal System/2 (R) (PS/2(R)) Model 90 XP 486 is a family of powerful and expandable desktop systems based on IBM's Micro Channel (TM) architecture and 32-bit 80486 processors. These new systems are designed to meet the needs of users in advanced computing environments requiring high performance with large amounts of memory, medium to large data storage capability, and high resolution graphics. The PS/2 Model 90 XP 486 systems provide technical leadership and reflects IBM's responsiveness to satisfy customers requirements."

System characteristics
Microprocessor: Intel 80486 SX or 80486DX (on processor complex)
Clock speed: 25 MHz or 33Mhz (DX)
Coprocessor: integrated 80487 on 486DX models
Type of BUS: 32-bit Micro Channel
Total number of expansion slots: 4 (desktop case)
Ports: PS/2 keyboard, PS/2 mouse, 2 DMA serial, DMA parallel, XGA,

Memory
Min/Max on system board: 4/32/64MB
Type of memory:
RAM: DRAM (PS/2 72-pin SIMM, MUST be installed in a MATCHED PAIR ) 70ns parity checked (8 sockets)
ROM: 128kb
Cache: 8kb L1, 0kb L2

Physical description
Power supply: 194w, 110-220VAC manual voltage switch
Weight: 11.4kg (25 lbs) (one fixed disk installed)
Dimensions (HxWxD): (140 x 440 x 430mm)

Mass storage
Drive bays: 4 ( 3 x 3.5" HH, 1 x 5.25" HH)
Floppy Disk
Size: 3.5 inch half-height
Capacity: 1.44MB
Hard disk
Size: 3.5 inch half-height
Capacity: 80 (0J5), 160MB (0J9), 320MB (0KD)
Access time:
Interface: SCSI (PS/2 bus master SCSI adapter/A with cache)

Display
Size:
Display type: Optional Analog CRT
Graphics modes supported: Integrated 32-bit XGA Display adapter

1024x768, 16 colours (256 colours w. memory expansion)
640x480, 256 colours

Keyboard
Type: 101 key enhanced, 122 key host connect, 84 key space saving

Software
Operating system: IBM PC DOS Versions 5.0

Configurations
Various memory, diskette drive, hard drive, monitor, and keyboard configurations including;
8590-0G5 - System Unit 486SX-20, 4MB, 80MB, 1.44, 101 keyboard
8590-0G9 - System Unit 486SX-20, 4MB, 160MB, 1.44, 101 keyboard
8590-0H5 - System Unit 486SX-25, 4MB, 80MB, 1.44, 101 keyboard
8590-0H9 - System Unit 486SX-25, 4MB, 160MB, 1.44, 101 keyboard
8590-0J5 - System Unit 486DX-25, 4MB, 80MB, 1.44, 101 keyboard
8590-0J9 - System Unit 486DX-25, 4MB, 160MB, 1.44, 101 keyboard
8590-0KD - System Unit 486DX-33, 4MB, 320MB, 1.44, 101 keyboard

Options

Description (#Feature Number)(Part Number)
SYSTEM BOARD MEMORY:

MEMORY CACHE:
DASD:
COMMUNICATIONS:
* Due to physical limitations of these adapters, they cannot be installed in slot #4 of the PS/2 Model 90 XP 486 systems.

PROCESSOR UPGRADE:
DISPLAYS AND DISPLAY ADAPTERS:
** - Supports VGA or lower resolution modes only.
$ - The IBM Personal System/ M-Motion Video Adapter requires the M-Motion Adapter Software Diskette version 1.01 or higher.

Plus many more IBM and 3rd party adapter cards...
Note: Options may no longer be available from IBM.

Document ID:  GJAN-43WKLB
Last Modified:  2000-04-13
Copyright © 2000 IBM Corporation